GB600955A - Improvements in or relating to electric pulse communication systems - Google Patents
Improvements in or relating to electric pulse communication systemsInfo
- Publication number
- GB600955A GB600955A GB21148/45A GB2114845A GB600955A GB 600955 A GB600955 A GB 600955A GB 21148/45 A GB21148/45 A GB 21148/45A GB 2114845 A GB2114845 A GB 2114845A GB 600955 A GB600955 A GB 600955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- channel
- pulses
- channels
- paired
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1676—Time-division multiplex with pulse-position, pulse-interval, or pulse-width modulation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
600,955. Multiplex pulse signalling. STANDARD TELEPHONES & CABLES, Ltd. Aug. 18, 1945, No. 21148. Convention date, Aug. 19, 1944. [Class 40 (v)] In a multiplex pulse communication system, means are provided in at least one of the channels to modify the relative pulse time positions of the modulated pulse train and corresponding means at the receiver restore the original time positions. The received interleaved pulse train may comprise substantially equally spaced pulses. In one embodiment of the type described in Specification 592,585, employing four channels, the pulse generators and modulators 2, 6, 7, 8, Fig. 1, of the type described in Specifications 600,244 or 600,254, are fed from a base wave source 1, with the necessary phase-shifts in circuits 3, 4, 5, and from the signal sources 9, 10, 11, 12. The modulator outputs are mixed 'and fed to a radio transmitter 13. Interposed between the modulator 8 for the fourth channel and transmitter 13 is a pulse position translator 14 of the type described in Specification 600,256. The pulse outputs for channels one, two and three are constituted by pairs 1a, 1b, 1c, 1d, 2a, 2b, &c., Fig. 4c, whilst the output from the fourth channel modulator 8 consists of paired pulses 4a, 4b, &c., Fig. 4d. The pulse position translator 14 is adjusted to shift the first of each pair, for example, 4a to a position such as 4a1 such that the new pair 4a1, 4b fit into the gap 42, Fig. 4c, in the combined transmitted pulse train. The phase-shifter 5 is first adjusted to bring pulse 4b into the desired position in the gap. Other multi-channel systems are described in which every transmitted channel includes a pulse position translator, Fig. 5 (not shown), every received channel includes a pulse position translator, Fig. 7 (not shown), and every receiver channel gating pulse circuit includes a pulse position translator, Fig. 9 (not shown). By this means the individual trains of channel pulses in the transmission medium may comprise evenly spaced or paired-off pulses and suitable adjustments can be made at the receiver properly to gate the incoming channels and convert them, if desired, for utilization by demodulators of the shock-excited tuned circuit type operating with paired-off pulses.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US600955XA | 1944-08-19 | 1944-08-19 | |
US286285XA | 1944-08-19 | 1944-08-19 | |
US550184A US2454792A (en) | 1944-08-19 | 1944-08-19 | Pulse multiplex communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB600955A true GB600955A (en) | 1948-04-23 |
Family
ID=34841581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21148/45A Expired GB600955A (en) | 1944-08-19 | 1945-08-18 | Improvements in or relating to electric pulse communication systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2454792A (en) |
GB (1) | GB600955A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2791737A (en) * | 1945-11-29 | 1957-05-07 | Jr Edward F Macnichol | Control system for maintaining synchronism between remote electric motors |
US2567203A (en) * | 1946-02-05 | 1951-09-11 | Marcel J E Golay | Multiplex communication system utilizing successive, different pulse modulation techniques |
US2719188A (en) * | 1950-05-05 | 1955-09-27 | Bell Telephone Labor Inc | Non-synchronous time division multiplex telephone transmission |
US2912506A (en) * | 1955-03-09 | 1959-11-10 | Itt | Communication system |
US3004459A (en) * | 1956-12-31 | 1961-10-17 | Baldwin Piano Co | Modulation system |
US3061815A (en) * | 1957-06-19 | 1962-10-30 | Rca Corp | Signal translating system |
US3069655A (en) * | 1957-12-11 | 1962-12-18 | Minneapolis Honeyweli Regulato | Switching systems |
US3042751A (en) * | 1959-03-10 | 1962-07-03 | Bell Telephone Labor Inc | Pulse transmission system |
US3521068A (en) * | 1967-06-15 | 1970-07-21 | Ibm | Optical time division multiplex communication system |
US5140611A (en) * | 1989-09-29 | 1992-08-18 | Rockwell International Corporation | Pulse width modulated self-clocking and self-synchronizing data transmission and method for a telephonic communication network switching system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2089639A (en) * | 1933-04-08 | 1937-08-10 | Rca Corp | Intelligence transmission |
GB470495A (en) * | 1935-11-14 | 1937-08-16 | Alan Dower Blumlein | Improvements in or relating to multiplex signalling systems |
US2406019A (en) * | 1941-04-01 | 1946-08-20 | Int Standard Electric Corp | Pulse modulation system |
US2406165A (en) * | 1944-07-01 | 1946-08-20 | Rca Corp | Communication system |
-
1944
- 1944-08-19 US US550184A patent/US2454792A/en not_active Expired - Lifetime
-
1945
- 1945-08-18 GB GB21148/45A patent/GB600955A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2454792A (en) | 1948-11-30 |
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